"I was taking the train down to Southern Cross to have lunch with a girlfriend down there, I sat back expecting the usual relaxing trip, put my ear pods in, I usually doze a little bit," she told the ABC's Jon Faine.

"He slowly walked along the aisle until he got to the driver's door, stood, stopped, turned around and just watched all of us, stared us all down, everybody in the carriage," she said.